JP2015081168A - Wind-up reel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wind-up reel capable of smoothly winding up metallic foil or an electrode material, and simply positioning a winding core forming body.SOLUTION: A wind-up reel 20 is equipped with a cylindrical winding core portion 21 wound with an end material 15 on its outer peripheral surface. The winding core portion 21 is formed by integrating cylindrical first and second winding core forming bodies 30 and 40 divided in a direction diagonally intersecting an axial direction of the winding core portion 21. The first and second winding core forming bodies 30 and 40 have first and second inclined surfaces 37 and 47 positioned on both divided surfaces. In the first and second winding core forming bodies 30 and 40, the maximum length from one end to the other end in the axial direction is longer than length in a lateral direction of the end material 15. The first winding core forming body 30 has a guide recessed portion 37a on the first inclined surface 37, and the second winding core forming body 40 has a guide projecting portion 47a engaged with the guide recessed portion 37a on the second inclined surface 47.

Description

  The present invention relates to a winding reel for winding a strip-shaped metal foil or an electrode material having an active material mixture coated on at least one surface of the strip-shaped metal foil.

  Power storage devices such as secondary batteries and capacitors are widely used as power sources because they can be recharged and can be used repeatedly. For example, as a power storage device mounted on a vehicle such as an EV (Electric Vehicle) or a PHV (Plug-in Hybrid Vehicle), a lithium ion secondary battery, a nickel hydride secondary battery, or the like is well known. These power storage devices have a sheet-like positive electrode and a sheet-like negative electrode each having an active material layer formed by applying a slurry-like or paste-like active material mixture containing an active material to a metal foil. The electrode assembly is laminated or wound so as to form a layer in the presence of the separator.

  In the manufacturing process of the positive electrode or the negative electrode, after the active material mixture is applied to the strip-shaped metal foil, the active material mixture is dried by heating, pressed to a predetermined thickness to form an active material layer on the metal foil, A positive electrode or negative electrode material is formed. Thereafter, both ends of the electrode material in the short direction are cut along the longitudinal direction, and the length of the electrode material in the short direction is adjusted to a size suitable for an electrode to be manufactured later and wound on a take-up reel. . At the same time, the portion of the electrode material cut from both ends in the short direction is wound up as another end material on another winding reel.

  Although the end material is discarded, it is troublesome to pull out the long end material wound up from the take-up reel and discard it. Therefore, by configuring the take-up reel with two divided bodies, the end material is moved in the axial direction while being wound up from one of the divided bodies, and the wound up end material is bundled. A technique that simplifies the disposal of mill ends by removing them from the divided body has been proposed (see, for example, Patent Document 1).

  As shown in FIG. 10A, the winding device of Patent Document 1 includes a winding shaft 81 that is cantilevered and a winding core 90 that can be attached to the winding shaft 81. A first boss 81a is fixed to the winding shaft 81, and a first flange disc 83a is fixed to the outer end surface of the first boss 81a. A male screw 81b is formed at the free end of the winding shaft 81, and a nut 84 with a sleeve can be screwed into the male screw 81b.

  The winding core 90 is composed of a pair of half-winding core bodies 90a and 90b obtained by dividing a cylindrical body into two tapers so that the cross-section thereof is smaller than a half circle. The outer peripheral surface of the first boss 81a is fixed to the inner peripheral surface of one end of one half core 90a, and the other end of the half core 90a is free of the winding shaft 81. It is arranged on the end side. Further, the outer peripheral surface of the second boss 81c is fixed to the inner peripheral surface of one end of the other half-winding core body 90b. A second flange disc 83b is attached to the second boss 81c, and a nut 84 with a sleeve is fitted inside the second boss 81c.

  When both ends of the pair of half-winding core bodies 90a and 90b are fitted outside the bosses 81a and 81c, a gap 95 is formed between the tapered end faces of the half-winding core bodies 90a and 90b. Is to be formed. One half core 90 a is fixed to the winding shaft 81, and the other half core 90 b is wound by screwing a nut 84 with a sleeve into the male screw 81 b of the winding shaft 81. Attached to the shaft 81. Then, while the core 90 is comprised by a pair of half core bodies 90a and 90b, the 1st and 2nd flange discs 83a and 83b are arrange | positioned at the both ends of the core 90, and the winding drum D is used. Composed.

  In order to remove the end material H wound around the winding core 90 from the winding drum D, first, the nut with sleeve 84 screwed to the free end of the winding shaft 81 is screwed off from the male screw 81b. The second flange disc 83b and the half core 90b are gradually pulled out in the axial direction of the winding shaft 81 by the rotation of the nut 84 with the sleeve.

  As shown in FIG. 10B, when the end portion of the half-winding core body 90b is detached from the first boss 81a, the tapered end surfaces of the pair of half-winding core bodies 90a and 90b are brought into close contact with each other. A gap 99 is formed between the hollow portion of the end material H taken and both the half-winding cores 90a and 90b. Due to this gap 99, only the removable half core 90 b is taken out from the winding drum D together with the end material H. As a result, the end material H can be removed from the half-winding core body 90b in a lump by moving the end material H that has been wound around the half-winding core body 90b in the axial direction.

JP-A-6-144712

  However, in the winding device disclosed in Patent Document 1, a gap 95 is formed between the end surfaces of the half-winding cores 90a and 90b that are tapered. As shown in FIG. 10 (c), the end material H is wound linearly at a portion facing the gap 95. As a result, the end material H is wound differently depending on the position along the circumferential direction of the core 90, and when the rotational speed of the core 90 is constant, the end material H may not be wound smoothly. There is.

  One half core 90 a is fixed to the winding shaft 81, while the other half core 90 b is formed by screwing a nut 84 with a sleeve onto the male screw 81 b of the winding shaft 81. It is attached to the winding shaft 81. For this reason, the diameter of the winding core 90 changes depending on the screwing amount (rotation amount) of the nut 84 with the sleeve, and the screwing of the nut 84 with the sleeve is accurate for positioning the half winding cores 90a and 90b. It must be done well.

  An object of the present invention is to provide a take-up reel capable of smoothly winding a metal foil or an electrode material and easily positioning a core-forming body.

  A winding reel for solving the above problem is a winding reel for winding an electrode material in which an active material mixture is applied to at least one surface of a strip-shaped metal foil or a strip-shaped metal foil, A cylindrical core portion around which the metal foil or the electrode material is wound around an outer peripheral surface is provided, and the core portion is divided into two from a dividing surface extending in a direction obliquely intersecting with the axial direction of the core portion. The formed cylindrical core forming bodies are integrated, and each core forming body has an inclined surface positioned on one end in the axial direction of the core forming body and positioned on the split surface of the core portion. And the maximum length from one end to the other end along the axial direction is longer than the length in the short direction perpendicular to the longitudinal direction of the metal foil or the electrode material, The inclined surface has a guide recess, and the other core former is formed on the inclined surface. It has a guide projection that engages the de recess, the inclined faces abut, and the core portion engages the guide projection and the guide recess is summarized in that configured.

  According to this, a pair of core formation body is integrated in the state which contacted the inclined surfaces on the division surface. For this reason, even if the core portion is formed by integrating a pair of core forming bodies, there is no gap along the dividing surface on the peripheral surface of the core portion, and the metal foil or electrode material is It is wound up in a certain state along the direction. Therefore, when the metal foil or the electrode material is wound around the core part by rotating the core part at a constant speed, the metal foil or the electrode material is uniformly wound around the core part without causing slackness, The metal foil or electrode material can be smoothly wound up.

  Further, by merely engaging the guide concave portion and the guide convex portion, the core forming bodies can be aligned with each other while the inclined surfaces are in contact with each other. Therefore, a core part formed by combining a pair of core forming bodies can be easily formed with high accuracy.

  In the take-up reel, the axial direction of the guide convex portion and the guide concave portion is inclined with respect to the axial direction of the core portion, and the inclination angle of the guide convex portion and the guide concave portion is the inclination The angle is preferably smaller than the angle of inclination of the surface.

  According to this, when one of the pair of core forming bodies is moved with respect to the other, the one core forming body moves along the inclination angle by the guide convex portion and the guide concave portion. Can be guided. For example, when a metal foil or an electrode material is wound around the core part with tension applied, it is difficult to move one core forming body along the axial direction of the core part. However, if one core forming body is moved along the inclination angle, one core forming body can be moved without being affected by the tension of the wound metal foil or electrode material, and the movement Can be easily performed. Then, when one core forming body is moved, the outer peripheral surface of the moved one core forming body is separated from the inner peripheral surface of the metal foil or electrode material, and between the outer peripheral surface and the inner peripheral surface. A space can be formed. If the space is formed, it becomes easier to move one of the core forming bodies, and the pair of core forming bodies can be easily divided.

  In addition, since the inclination angle of the guide convex portion and the guide concave portion is smaller than the inclination angle of the inclined surface, the amount of movement in the radial direction is less than when one core forming body is moved along the inclined surface. can do.

In addition, with respect to the winding reel, each core forming body preferably includes a latching portion protruding in the radial direction of the core forming body at the other axial end.
According to this, when moving a core formation body, it becomes easy to move a core formation body by hooking a hand to a latching | locking part.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to wind up metal foil or an electrode material smoothly, positioning of a core formation body can be performed easily.

(A) And (b) is a figure which shows a cutting device typically. The perspective view which shows the reel for winding of embodiment. The side view which shows the reel for winding of embodiment. Sectional drawing which shows the reel for winding of embodiment. The perspective view which shows a core formation body. (A) is the elements on larger scale which show the state which integrated the core formation bodies with the volt | bolt, (b) is the elements on larger scale which show the engagement state of a guide convex part and a guide recessed part. Sectional drawing which shows the state which moved the 1st core formation body. The fragmentary sectional view which shows a 2nd core formation body and an end material. The perspective view which shows the core formation body of another example. (A) is a sectional side view showing the background art, (b) is a sectional side view showing a state in which the half-winding core body is moved, and (c) is a diagram showing a gap in the half-winding core body.

Hereinafter, an embodiment in which a take-up reel is embodied will be described with reference to FIGS.
First, the cutting device 10 on which the take-up reel 20 is set will be described.
As shown in FIGS. 1A and 1B, the cutting device 10 is a device for cutting a long electrode material 12 into a predetermined width by cutting both side portions in the short direction. . The electrode material 12 includes a coating portion 11b formed by applying an active material mixture on both sides of a long metal foil 11a. The cutting device 10 includes a supply reel 13 on which the electrode material 12 is wound in advance, and a recovery reel 14 that winds up the electrode material 12 from which both side portions of the electrode material 12 are cut off. The supply reel 13 and the recovery reel 14 are rotatably supported by shafts 13a and 14a, respectively. Further, the cutting device 10 includes a pair of cutting teeth 10 a, and the pair of cutting teeth 10 a are disposed on both sides in the short direction of the electrode material 12 fed from the supply reel 13.

  The cutting device 10 includes a pair of winding reels 20 for winding the end material 15 cut from the electrode material 12 by the cutting teeth 10a, and the cutting device 10 rotatably supports the winding reel 20. A shaft 19 is provided. The end material 15 is long and the end material 15 is a metal foil.

Next, the take-up reel 20 will be described.
As shown in FIGS. 2 and 4, the take-up reel 20 is configured by integrating a first core forming body 30 and a second core forming body 40. The take-up reel 20 includes a cylindrical core 21. The winding core portion 21 has an insertion hole 21a, and a shaft 19 that rotatably supports the take-up reel 20 can be inserted into the insertion hole 21a. The length of the winding reel 20 and the winding core 21 in the direction along the central axis L (hereinafter referred to as the axial direction) is longer than the length N of the end material 15 in the short direction. The winding reel 20 includes a first latching portion 32 at one end in the axial direction of the winding core portion 21 and a second latching portion 42 at the other axial end of the winding core portion 21. The 1st and 2nd latching | locking parts 32 and 42 protrude in the radial direction of the core part 21, and the cross sectional view along the axial direction of the core part 21 is L type.

  As shown in FIGS. 4 and 5, the first core forming body 30 includes a cylindrical first outer cylinder portion 33 and a first inner cylinder portion 33 on the inner peripheral side of the first outer cylinder portion 33. A cylindrical portion 34 is provided. The inner peripheral surface of the first outer cylinder part 33 and the outer peripheral surface of the first inner cylinder part 34 are separated by a certain distance over the entire axial direction of the core part 21. Among the lengths along the axial direction of the first outer cylinder portion 33, the maximum length L <b> 1 is set to be longer than the length N along the short direction of the end material 15.

  The first core former 30 includes a first closing portion 35 at one axial end. The first closing portion 35 has a disk shape with a circular hole opened at the center. One end in the axial direction of the first outer cylinder portion 33 is joined to the outer peripheral edge portion of the first closing portion 35, and the shaft of the first inner cylinder portion 34 is connected to the inner peripheral edge portion of the first closing portion 35. One end of the direction is joined. The first closing portion 35 is defined between the one end edge of the first outer cylinder portion 33 and the one end edge of the first inner cylinder portion 34 at one axial end of the first core forming body 30. The opened opening is closed.

  The first core forming body 30 has a first inclined surface 37 formed by the outer surface of the first closing portion 35 at one end in the axial direction. The first inclined surface 37 (the outer surface of the first closing portion 35) is inclined at an inclination angle θ1 with respect to the axial direction of the core portion 21. The first closing portion 35 is provided from one end in the axial direction of the first core forming body 30 to the other end.

  The other axial ends of the first outer cylinder part 33 and the first inner cylinder part 34 are joined to the first latching part 32. Further, the first core forming body 30 has a guide concave portion 37 a at a position closest to the first latching portion 32 on the first inclined surface 37. The guide recess 37a is inclined at an inclination angle θ2 in the axial direction (the direction in which the guide recess 37a is recessed from the first inclined surface 37) with respect to the axial direction of the core portion 21 (straight line La parallel to the central axis L). ing. The inclination angle θ2 of the guide recess 37a is set smaller than the inclination angle θ1 of the first inclined surface 37. The first core forming body 30 is provided with a female screw hole 39 at a position that is the one end surface in the axial direction of the first outer cylinder portion 33 and is farthest from the first latching portion 32. The female screw hole 39 is located within the range of the length in the radial direction of the first core forming body 30. The female screw hole 39 and the guide concave portion 37 a are disposed at positions facing the radial direction of the first core forming body 30.

  The second core forming body 40 includes a cylindrical second outer cylinder portion 43 and a second inner cylinder portion 44 on the inner peripheral side of the second outer cylinder portion 43. The inner peripheral surface of the second outer cylinder part 43 and the outer peripheral surface of the second inner cylinder part 44 are separated by a certain distance over the entire axial direction of the core part 21. Among the lengths along the axial direction of the second outer cylinder portion 43, the maximum length L <b> 2 is set to be longer than the length N along the short direction of the end material 15.

  The second core formation body 40 includes a second closing portion 45 at one axial end. The second closing portion 45 has a disk shape with a circular hole opened at the center. One end in the axial direction of the second outer cylinder portion 43 is joined to the outer peripheral edge portion of the second closing portion 45, and the shaft of the second inner cylinder portion 44 is connected to the inner peripheral edge portion of the second closing portion 45. One end of the direction is joined. The second closing portion 45 is a partition between the one end edge of the second outer tube portion 43 and the one end edge of the second inner tube portion 44 at one axial end of the second core forming body 40. The opened opening is closed.

  The second core forming body 40 has a second inclined surface 47 formed by the outer surface of the second closing portion 45 at one end in the axial direction. The second inclined surface 47 (the outer surface of the second closing portion 45) is inclined at an inclination angle θ1 with respect to the axial direction of the core portion 21. The inclination angles of the first inclined surface 37 and the second inclined surface 47 are the same. The second closing portion 45 is provided from one end in the axial direction of the second core forming body 40 to the other end.

  The other axial ends of the second outer cylinder portion 43 and the second inner cylinder portion 44 are joined to the second latching portion 42. The second inclined surface 47 has a guide convex portion 47 a at a position farthest from the second hooking portion 42. The axial direction of the guide convex portion 47a (the direction in which the guide convex portion 47a protrudes from the second inclined surface 47) is inclined at an inclination angle θ2 with respect to the axial direction of the core portion 21. The inclination angle of the guide convex portion 47a and the guide concave portion 37a is the same, and the inclination angle θ2 of the guide concave portion 37a and the guide convex portion 47a is set smaller than the inclination angle θ1 of the first and second inclined surfaces 37, 47. ing. The guide convex portion 47 a is formed by fitting a pin-shaped guide convex portion 47 a into an attachment hole 47 b provided in the second inclined surface 47.

  As shown in FIG. 3, the second core forming body 40 is inserted into the other end surface in the axial direction of the second outer cylinder portion 43 and at a position facing the female screw hole 39 when the core portion 21 is formed. A hole 49 is provided. A bolt 50 that can be screwed into the female screw hole 39 can be inserted into the insertion hole 49.

  As shown in FIGS. 6A and 6B, in the take-up reel 20, the guide protrusions of the second core forming body 40 are formed in the guide recesses 37 a of the first core forming body 30. The bolt inserted into the insertion hole 49 in a state where the portion 47a is engaged and the female screw hole 39 of the first core forming body 30 and the insertion hole 49 of the second core forming body 40 are aligned and aligned. 50 is screwed into the female screw hole 39. Then, the first core forming body 30 and the second core forming body 40 are integrated, and the core portion is formed from the outer peripheral surface of the first outer cylindrical portion 33 and the outer peripheral surface of the second outer cylindrical portion 43. The outer periphery of 21 is formed.

  As shown in FIG. 4, the inner periphery of the core portion 21 is formed from the inner peripheral surface of the first inner cylinder portion 34 and the inner peripheral surface of the second inner cylinder portion 44, and the insertion hole 21a is formed. Is done. The first hook portion 32 and the second hook portion 42 are disposed at both ends of the core portion 21 in the axial direction, and the take-up reel 20 is formed. In the take-up reel 20, the first inclined surface 37 and the second inclined surface 47 are located on the dividing surface of the core part 21 and are in contact with each other on the dividing surface. The split surface of the core part 21 extends from one end in the axial direction of the core part 21 to the whole of the other end and crosses obliquely with respect to the axial direction of the core part 21.

Next, how to use the take-up reel 20 will be described together with the operation.
First, the winding core 20 is formed by integrating the first winding core forming body 30 and the second winding core forming body 40. The guide convex portion 47a is engaged with the guide concave portion 37a, and the first core forming body 30 and the second core forming body 40 are relatively rotated with the engaging position as the rotation center. Then, when the first inclined surface 37 and the second inclined surface 47 are brought into contact with each other, the female screw hole 39 and the insertion hole 49 are matched. Thereafter, the bolt 50 inserted through the insertion hole 49 is screwed into the female screw hole 39, and the first winding core forming body 30 and the second winding core forming body 40 are integrated to complete the winding reel 20.

  Next, the take-up reel 20 is set on the shaft 19 of the cutting device 10 to cut the electrode material 12. When the cutting device 10 is driven, the end material 15 cut off from the electrode material 12 is wound in a state where tension is applied to the core portion 21 that rotates at a constant speed.

  In order to discard the end material 15 wound on the winding reel 20, first, the winding reel 20 is removed from the shaft 19. Next, the bolt 50 is screwed out from the female screw hole 39 and extracted from the insertion hole 49. And a hand is latched to the 2nd latching | locking part 42, the 2nd core formation body 40 which is one core formation body is made into the 1st core formation body 30 which is the other core formation body. Move against. Then, the first core forming body 30 is guided by the guide concave portion 37a and the guide convex portion 47a so as to move in a direction inclined with respect to the central axis L at the inclination angle θ2.

  Then, as shown in FIG. 7, when the second core forming body 40 is moved radially outward of the core portion 21, the inner peripheral surface of the end material 15 and the second core forming body 40 in the second core forming body 40 are moved. A space S is formed between the outer peripheral surface of the two outer cylinder portions 43. The more the first core forming body 30 is separated from the second core forming body 40, the larger the space S becomes, and the second core forming body 40 can be easily moved.

  Then, as shown in FIG. 8, when the second core forming body 40 is extracted from the inside of the end material 15, the end material 15 is taken up by the first outer cylinder portion 33 of the first core forming body 30. It will be in the state. Thereafter, the end material 15 can be removed from the first core forming body 30 in a lump by moving the end material 15 in the axial direction while being wound from the first outer cylinder portion 33.

According to the above embodiment, the following effects can be obtained.
(1) The core portion 21 of the take-up reel 20 is formed by integrating the first core forming body 30 and the second core forming body 40, and has a first inclined surface 37 and a second inclined surface. The surface 47 is located on the split surface of the core part 21 and is in contact with the entire surface. For this reason, on the peripheral surface of the core part 21, the clearance gap along a division surface is not formed, but an outer peripheral surface is a circumferential surface shape. Therefore, when the end material 15 is wound around the core 21, the end material 15 is not loosely wound due to the gap, and the end material 15 can be wound smoothly.

  (2) When the first core forming body 30 and the second core forming body 40 are integrated, the guide convex portion 47a is engaged with the guide concave portion 37a, so that the engagement position is the center of rotation. The first core forming body 30 and the second core forming body 40 can be relatively rotated. For this reason, if the 1st inclined surface 37 and the 2nd inclined surface 47 are match | combined, the internal thread hole 39 and the penetration hole 49 can be matched, and the 1st core formation body 30 and the 2nd core formation body 40 positioning can be easily performed.

  (3) The outer peripheral surface of the core part 21 is formed by the outer peripheral surfaces of the first and second core forming bodies 30 and 40. For this reason, if the 1st inclined surface 37 and the 2nd inclined surface 47 are contact | abutted in the whole surface, the core part 21 can always be made into a fixed outer diameter.

  (4) The maximum lengths L1 and L2 in the axial direction of the first and second outer cylinder portions 33 and 43 are longer than the length N of the end material 15 in the short direction. For this reason, even in the state where the end material 15 is wound around the core portion 21, the first latching portion 32 among the contact portions (divided surfaces) of the first inclined surface 37 and the second inclined surface 47. And the part by the side of the 2nd latching | locking part 42 is not covered with the both ends of the transversal direction of the end material 15. FIG. Therefore, when the second core forming body 40 is moved from the split surface of the core 21 toward the radially outer side of the core 21, the movement is not hindered by the end material 15, and the second core The formed body 40 can be easily moved.

  (5) The inclination angle θ2 with respect to the central axis L of the guide concave portion 37a and the guide convex portion 47a is smaller than the inclination angle θ1 with respect to the central axis L of the first and second inclined surfaces 37 and 47. For this reason, when the second core forming body 40 is moved along the guide concave portion 37 a of the guide convex portion 47 a, the second inclined surface 47 is moved along the first inclined surface 37. Compared with, the amount of movement of the second core forming body 40 in the radial direction can be reduced.

  (6) The female screw hole 39 is an end face in the axial direction of the first outer cylinder portion 33, and is provided at a position farthest from the first latching portion 32. Further, the insertion hole 49 is provided at a position closest to the second latching portion 42 in the second outer cylinder portion 43. For this reason, compared with the case where the female screw hole 39 and the insertion hole 49 are provided in other positions, the length of the bolt 50 can be shortened, and the work of screwing the bolt 50 into the female screw hole 39 is facilitated.

  (7) By engaging the guide convex portion 47a with the guide concave portion 37a and screwing the bolt 50 penetrating the insertion hole 49 into the female screw hole 39, the rotation restricting portion is located at two locations in the circumferential direction. It is formed. Therefore, only by forming the guide concave portion 37a, the guide convex portion 47a, the female screw hole 39, and the insertion hole 49, the first core forming body 30 and the second core forming body 40 in the relative circumferential direction. The positional deviation can be regulated.

  (8) The guide concave portion 37 a is provided on the inner side from the outer peripheral surface of the first outer cylinder portion 33, and the guide convex portion 47 a is provided on the inner side from the outer peripheral surface of the second outer cylinder portion 43. For this reason, the structure for positioning the 1st core formation body 30 and the 2nd core formation body 40 is not provided in the outer peripheral surface of the core part 21, but an end material is provided in the outer peripheral surface of the core part 21. 15 can be wound directly.

  (8) The first core forming body 30 includes a first latching portion 32, and the second core forming body 40 includes a second latching portion 42. For this reason, when moving the 1st core formation body 30 or the 2nd core formation body 40, by hooking a hand to the 1st latching part 32 or the 2nd latching part 42, the It becomes easier to move.

In addition, you may change the said embodiment as follows.
As shown in FIG. 9, the first core forming body 30 may not have the first closing portion 35, and the second core forming body 40 may not have the second closing portion 45. In this case, in the first core forming body 30, the first inclined surface 37 is formed by the axial ends of the first outer cylinder portion 33 and the first inner cylinder portion 34, and the second core forming body 30 is formed. In 40, the second inclined surface 47 may be formed by the axial ends of the second outer cylinder portion 43 and the second inner cylinder portion 44 themselves.

  In the embodiment, the first core forming body 30 may not have the first hooking portion 32, and the second core forming body 40 may not have the second hooking portion 42. Alternatively, the take-up reel 20 may include only one of the first hook 32 and the second hook 42.

The inclination angle θ2 of the guide concave portion 37a and the guide convex portion 47a may be the same as or larger than the inclination angle θ1 of the first inclined surface 37 and the second inclined surface 47.
The split surfaces of the first core forming body 30 and the second core forming body 40 extend from one end in the axial direction of the core portion 21 to the entire other end, but are not limited thereto. The dividing surface is formed in the middle of the core portion 21 in the axial direction, and the first core forming body 30 and the second core forming body 40 can be separated from the middle of the core portion 21 in the axial direction. May be.

  In the embodiment, the second core forming body 40 is moved in a state where the end material 15 is wound around the first core forming body 30, but the end material is moved to the second core forming body 40. You may move the 1st core formation body 30 in the state by which 15 was wound up.

The guide concave portion 37a and the guide convex portion 47a may be provided at two or more locations, and the female screw hole 39 and the insertion hole 49 may be provided at two or more locations.
The reel 20 for winding is used for winding the end material 15 as a metal foil, but may be used for winding the electrode material 12.

The electrode material 12 has the coating part 11b formed on both sides of the metal foil 11a, but may have the coating part 11b formed on one side of the metal foil 11a.
Next, the technical idea that can be grasped from the above embodiment and other examples will be described below.

(A) The guide convex portion and the guide concave portion are provided one by one.
(B) The first core former is provided with a female screw hole on the inclined surface, and the second core former is provided with an insertion hole that matches the female screw hole in a state where the core portion is formed. .

  N: Length, θ1, θ2: Inclination angle, L1, L2: Maximum length, 11a: Metal foil, 12: Electrode material, 20: Reel for winding, 21: Core part, 30: First core Forming body, 32 ... 1st latching part, 37 ... 1st inclined surface, 37a ... Guide recessed part, 40 ... 2nd core formation body, 42 ... 2nd latching part, 47 ... 2nd inclination Surface, 47a ... guide convex part.

Claims (3)

A winding reel for winding an electrode material in which an active material mixture is applied to at least one surface of a band-shaped metal foil or a band-shaped metal foil,
The metal foil or the electrode material comprises a cylindrical core part around which the outer peripheral surface is wound,
The core portion is formed by integrating a cylindrical core forming body divided into two from a split surface extending in a direction obliquely intersecting with the axial direction of the core portion,
Each core forming body has an inclined surface positioned on one end in the axial direction of the core forming body and positioned on the split surface of the core portion, and
The maximum length from one end to the other end along the axial direction is longer than the length in the short direction perpendicular to the longitudinal direction of the metal foil or the electrode material,
One winding core forming body has a guide recess in the inclined surface,
The other core forming body has a guide convex portion that engages with the guide concave portion on the inclined surface,
The winding reel is characterized in that the inclined surfaces are in contact with each other and the guide concave portion and the guide convex portion are engaged to form the winding core portion.   The axial direction of the guide convex part and the guide concave part is inclined with respect to the axial direction of the core part, and the inclination angle of the guide convex part and the guide concave part is smaller than the inclination angle of the inclined surface. The take-up reel according to 1.   Each winding core formation body is a reel for winding of Claim 1 or Claim 2 provided with the latching | locking part which protrudes in the radial direction of the said core formation body at the other axial end.